Re: [PATCH 3/4] block-dma: properly take MMIO path

[Keith Busch]

On Mon, Oct 13, 2025 at 06:34:11PM +0300, Leon Romanovsky wrote:
>  static bool blk_dma_map_direct(struct request *req, struct device *dma_dev,
>  		struct blk_dma_iter *iter, struct phys_vec *vec)
>  {
> +	unsigned int attrs = 0;
> +
> +	if (req->cmd_flags & REQ_MMIO)
> +		attrs |= DMA_ATTR_MMIO;

Since data and integrity paylods use these same functions and may point
to different kinds of memory, I think you'd have to pass the 'attrs'
from the caller since it knows which flags to check for MMIO dma.